package com.zyb.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.zyb.eduservice.entity.EduSubject;
import com.zyb.eduservice.entity.excel.SubjectData;
import com.zyb.eduservice.service.EduSubjectService;
import com.zyb.servicebase.exception.GuliException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;

    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData==null){
            throw new GuliException(20001,"文件数据为空");
        }

        //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject eduOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (eduOneSubject==null){//没有相同一级分类，进行添加
            eduOneSubject=new EduSubject();
            eduOneSubject.setTitle(subjectData.getOneSubjectName());
            eduOneSubject.setParentId("0");
            subjectService.save(eduOneSubject);
        }

        //获取一级分类id值
        String pid=eduOneSubject.getId();
        //添加二级分类
        //判断二级分类是否重复
        EduSubject eduTwoSubject = this.existTwoSubject(subjectData.getTwoSubjectName(), pid, subjectService);
        if (eduTwoSubject==null){
            eduTwoSubject=new EduSubject();
            eduTwoSubject.setTitle(subjectData.getTwoSubjectName());
            eduTwoSubject.setParentId(pid);
            subjectService.save(eduTwoSubject);
        }
    }

    //判断1级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断2级分类不能重复添加
    private EduSubject existTwoSubject(String name,String pid,EduSubjectService subjectService){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
